Epson LX300 No power symptoms

TRL No.

WH0902-2

TRL.Blank.doc

Name

Department

Date / Time

Christopher Kaut

Warehouse

19/02/09  2:13pm

Job Description:

Printer No power.

Equipment Description:

Epson LX300 dot matrix printer. This is the same printer I made modifications on the power supply

(REF# WH0811-3)

FX1120 Power Board fits perfectly in an ATX power supply Casing
FX1120 Power Board fits perfectly in an ATX power supply Casing

 

 

 

 

Diagnosis:

-Continuity check on fuse with multi-meter. OK

-Voltage trace from AC supply through fuse and across current sensor resistor. Discovered zero voltage after resistor.

-Ohms check on resistor. Opened. Continuity check. Open.

– All other major components like large filter caps, FET and transformer primary windings checked ok.

 

Fault:

Sensor Resistor 0.5Ω opened during high power surge caused by power black outs.

 

FX1120 powerboard used for external power supply to LX300
FX1120 powerboard used for external power supply to LX300

 

 

 

 

Remedy / Recommendations:

Directly replaced resistor. I replaced with a 1Ω resistor.  Switched on and the printer came back to life.

 

 

Date / Time Accomplished:

19/02/09  2:40pm

 

www.jakemans1020.wordpress.com
http://www.jakemans1020.wordpress.com

 

 

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Published by

Jakeman's 10-20

"When the power of love overcomes the love of power, the world will know peace." - Jimmy Hendrix (1942 - 1970)

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